CaO-SiO2-Al2O3-MgO-FeO渣系FeO活度的计算模型

利用熔渣结构共存理论建立了CaO-SiO2-Al2O3-MgO-FeO渣系FeO活度的计算模型，并分析了1400℃时炉渣碱度、MgO和FeO含量对该渣系FeO活度的影响规律。结果表明：当CaO-SiO2-Al2O3-MgO-FeO渣系三元碱度为1.3，Al2O3含量为12wt%，FeO含量为2wt%条件下，随MgO含量的增加，炉渣FeO活度增大；当二元碱度为1.1，Al2O3含量为12wt%，MgO含量为10wt%时，FeO活度随随渣中FeO含量的增加呈线性增加；当渣中Al2O3、MgO和FeO含量分别为12wt%、10wt%和2wt%固定不变时，随着二元碱度的提高，炉渣FeO活度迅速增加。计算得到的上述规律和实测规律一致，说明了本模型用于分析FeO活度的正确性。

Calculation Model of FeO Activity for CaO-SiO2-Al2O3-MgO-FeO Slag

The calculation model of FeO activity for CaO-SiO2-Al2O3-MgO-FeO slag was formulated by the coexistence theory of slag structure.The effects of slag basicity,MgO and FeO content on FeO activity were analyzed at 1 400 ℃.The results show that when the ternary basicity is 1.3,Al2O3 content is 12%,and FeO content is 2%,FeO activity increases with the increase of MgO content in slag.When the value of binary basicity,Al2O3 and MgO content is 1.1,12% and 10% respectively,FeO activity rises with increasing FeO content in slag.For the slag with 12% Al2O3 content,10% MgO content and 2% FeO content,FeO activity rises rapidly when the binary basicity is increased.The above rules are consistent with that obtained by experiments,which illustrates the correctness for using the coexistence theory to calculate the FeO activity of CaO-SiO2-Al2O3-MgO-FeO slag.